$$4x+8x-12y-24y$$

$$36x^2+60x\cdot25$$

$$\sec\theta-\frac{\cos\theta}{\sin\theta+1}=\tan\theta$$

$$1,875+3,125$$

$$\frac{2x^3+4x^2-5}{2x^2-2}$$

$$\int40x^4\csc^2\left(9x^5+10\right)dx$$

$$\frac{1}{3x^{-5}}$$